参数资料
型号: WJLXT384LEB1
厂商: INTEL CORP
元件分类: 数字传输电路
英文描述: DATACOM, PCM TRANSCEIVER, PQFP144
封装: 20 X 20MM, ROHS COMPLIANT, LQFP-144
文件页数: 112/140页
文件大小: 1514K
代理商: WJLXT384LEB1
73
Document Number: 248994
Revision Number: 005
Revision Date: November 28, 2005
Intel LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
7.4.2
Host Processor Mode - Serial Interface
A Host Processor mode with a serial interface consisting of the CS, SCLK, SDI, and SDO pins is
selected by connecting the MODE pin to a voltage that is equal to 1/2 VCC (which can be
accomplished by connecting one 10k
Ω resistor to VCC and a second 10k Ω resistor to ground).
Figure 14 shows timing for the host processor interface when it is in serial mode. Registers are
accessible through a 16-bit word consisting of the following:
An 8-bit Address/Command byte.
— The signal on the R/W pin determines whether a read or a write operation occurs.
— The signals on pins A1-A5 go to an address decoder that decodes an address. (The address
decoder ignores signals on the A6 and A7 pins.)
A subsequent 8-bit Data byte. (Depending on the R/W state, the D0-D7 values are valid on
either SDI or SDO, but never are the D0-D7 values valid on both SDI and SDO.)
—When R/W = 0, D0-D7 on SDO are don’t cares. The D0-D7 values on SDI are active,
with valid data being written to the LXT384 Transceiver.
—When R/W = 1, the D0-D7 values on SDO are active, with valid data that the LXT384
Transceiver writes to the host processor. The D0-D7 values on SDI are don’t cares.
Figure 14. Host Processor Mode - Serial Interface Read Timing
R/W
A1
A2
A3
A4
A5
A7
(Don't
care)
R/W = 1: Read operation
R/W = 0: Write operation (SDO remains high impedance)
Address / Command Byte
D0
D1
D2
D3
D4
D5
D6
D7
Input (Write) Data Byte
D0
D1
D2
D3
D4
D5
D6
D7
Output (Read) Data Byte
High Impedance
A6
(Don't
care)
CS
SCLK
SDI
SDO
相关PDF资料
PDF描述
WJLXT384LEB1 DATACOM, PCM TRANSCEIVER, PQFP144
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WJLXT385LEB1 DATACOM, PCM TRANSCEIVER, PQFP144
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